Success!! PCB with Shapeoko

[xpix]

How do you like that spindle over the Proxxon rotatory tool??

The Problem with Proxxon is the vibrations, this let the Endmill dancing and i broke some (expensive) from this guys. My Solution was to find a spindle with less vibrations. I found the solution in edward fords' Thread: http://www.shapeoko.com/forum/viewtopic.php?f=21&t=1012 about this spindle and order this just in time.

Ok, the spindle need's a Speed Control and a special Powers supply (48V, 3A) and max rpm is ~12.000 rpm. But she is so silent and has no vibrations, awesome ... but the vacuum cleaner for vacuumtable is extremly laud I try to get a used vacuumpump from ebay

Now i get this week the cute camera: http://www.ebay.de/itm/280857712491 and i hope i can drill the PCB.

@wlanfox: Can u explain, why u use a mirror in ur second photo: http://www.shapeoko.com/forum/viewtopic ... t=10#p9038. Maybe to find the middle from camera?

[wlanfox]

@wlanfox: Can u explain, why u use a mirror in ur second photo: http://www.shapeoko.com/forum/viewtopic ... t=10#p9038. Maybe to find the middle from camera?

Yes, that is exactly why I used the mirror, is mostly explain here: http://www.shapeoko.com/forum/viewtopic ... t=10#p9004.

in brief, even if you manage to get the camera body perfectly parallel to your Z-axis and perpendicular to your work surface; this doesn't mean that the actual camera sensor inside the camera body is perfectly parallel to it. What you get at the end as in shown with the right-triangle, is that you line of sight is actually segment "c", Angles A,B,C ar actually fixed (mechanical mounted) and segment "b" will be you Z-axis moving up and down. Segment "a" is directly proportional to segment "b" if B is to high then the drift (you cross-hair will move away form your target) is grater.

By using the mirror and centering the cross-hair in the middle of the sensor leses you have better changes to reduce segment "a" as much as possible, of course "0.00" will be ideal. With my set up at the end I observed a 0.1mm drift with a height change of 40mm. Which means that if I put something on my cross-hair and then put it someplace else and the height change is on my Z-axis is 40mm I can be sure that there will be a max drift of 0.1mm... and more importantly sinc ethis is DIRECTLY proportional it also mean that at a change of height of 10mm the drift will only be 0.025mm. Usually when aligning between runs I try to be at exactly the same height as when I did the 0,0,20 alignment. For argument sake lets assume that between alignments I am 1mm different in height that will mean that my drift will be 0.0025mm.

I found about this technique form the other site listed in the post (http://www.cnczone.com/forums/general_m ... ystem.html)

-wlanfox

[xpix]

Hi, sorry for my late answer.

I got the little endoskop camera and try to make a stable holder for this little thing At the end of this story, i want drill the PCB in this thread ... but to find the right position i want to use this technice from wlanfox: http://www.shapeoko.com/forum/viewtopic ... t=10#p9004

@wlanfox: thank you very much for ur explain. If i right understand, if i dont move camera in z-axis, then the results are better or i read the position only in position Z10?

[wlanfox]

If i right understand, if i dont move camera in z-axis, then the results are better or i read the position only in position Z10?

Yes if you Z-axis is at the same height and distance form the target you will have no drift because of line-of-sight not being perfectly perpendicular to the work surface. Also make sure your camera is secure, if not vibration from the spindle can move it. Now experiment first on some trow-away parts until you get comfortable with measuring your cross-hair to drill bit offset.

I follow these steps to start work on a new piece: http://www.shapeoko.com/forum/viewtopic ... t=20#p9058

[xpix]

Next try

Im close to a perfect PCB, but the holes have a little wrong position:

Result

IMG_1795.jpg (52.42 KiB) Viewed 2336 times

I try to use my endoscope camera to correct zero my router next time.

Here a youtube video with the complete machine:

[xpix]

Next try, now success with the great script gcs from wlanfox!


This is only single pass calculate from pcb-gcode. Looks crazy but works well, i measure every line and its ok

ImageUploadedByTapatalk 21361989959.101639.jpg (184.36 KiB) Viewed 2234 times

ImageUploadedByTapatalk 21361989982.958330.jpg (71.71 KiB) Viewed 2234 times

Sent from my iPhone using Tapatalk 2

[scott216]

- I build one for grbl and copy this to pcb-gcode/profiles/shapeoko.pp. Then call ulp-script for settings and choose this profile. (untestet grbl code!)

Where did you get the shapeoko.pp file?